| ID | Title | Ratio(AC/submit) |
Date |
| 3540 | Formula | 16%(22/132) | Oct 13, 2023 |
| 3551 | Putin-chess | 19%(28/146) | Mar 26, 2021 |
| 3568 | Diver | 49%(81/163) | Aug 19, 2023 |
| 3529 | Matrix Analysis | 23%(39/168) | Dec 6, 2022 |
| 3545 | K’ak’-u-pakal and Mayan Script | 15%(28/181) | Jul 21, 2022 |
| 3564 | Magic pyramid | 15%(30/195) | Oct 11, 2021 |
| 3563 | Parabolic teleports | 6%(13/208) | Oct 20, 2021 |
| 3560 | Supersquare | 18%(38/211) | Oct 13, 2021 |
| 3574 | Japanese Writing | 48%(120/247) | Sep 5, 2025 |
| 3531 | Alternating Sum of Digits | 18%(46/254) | May 31, 2025 |
| 3575 | Kingdom Partitioning | 14%(40/277) | Jan 11, 2024 |
| 3515 | Moving Sticks | 29%(82/278) | Sep 1, 2025 |
| 3552 | Snatch! | 23%(69/290) | Dec 5, 2024 |
| 3556 | Increasing subsequences | 24%(72/300) | Jul 21, 2024 |
| 3558 | Map Generator returns (MG-II) | 44%(140/314) | Jan 2, 2025 |
| 3599 | Pumping Lemma | 36%(116/319) | Sep 1, 2025 |
| 3584 | Small Polynomial Factorization | 19%(64/329) | Dec 18, 2024 |
| 3596 | Illuminated Planet | 28%(101/350) | Sep 2, 2025 |
| 3591 | Ants and Aphides | 8%(30/367) | Dec 19, 2020 |
| 3520 | Lowest Pyramid | 23%(87/376) | Sep 14, 2025 |
| 3547 | Cube evolvent | 26%(104/395) | Mar 19, 2025 |
| 3521 | Geometric Map | 39%(158/400) | Sep 12, 2025 |
| 3549 | GSM phone | 12%(53/418) | Oct 11, 2024 |
| 3571 | Game | 27%(116/427) | Dec 22, 2022 |
| 3500 | Youth Hostel Dorm | 25%(116/450) | Sep 1, 2025 |
| 3555 | Cocktail | 21%(109/504) | Sep 2, 2025 |
| 3559 | Trigonometric optimization | 10%(55/522) | Sep 1, 2025 |
| 3506 | Walk | 29%(157/532) | Sep 5, 2025 |
| 3562 | “Roman” corridor | 34%(187/550) | Jul 31, 2024 |
| 3548 | Restoring the digits | 31%(194/622) | May 13, 2025 |
| 3582 | Last Hit | 1%(8/639) | Feb 27, 2025 |
| 3533 | Light Switching Game | 59%(401/669) | Sep 24, 2025 |
| 3527 | Generalized Connect Four | 17%(121/687) | May 31, 2025 |
| 3569 | Equation | 18%(130/691) | Dec 29, 2023 |
| 3578 | Card Game | 11%(83/713) | Sep 1, 2025 |
| 3595 | Full Steiner Topologies | 35%(266/755) | Nov 18, 2024 |
| 3572 | Hanoi Towers | 49%(378/765) | Sep 6, 2025 |
| 3570 | Fund Management | 20%(159/775) | May 8, 2025 |
| 3553 | Task schedule | 58%(470/801) | Aug 18, 2025 |
| 3526 | The Teacher’s Side of Math | 29%(250/841) | Sep 1, 2025 |
| 3502 | Flight Safety | 20%(174/854) | May 25, 2025 |
| 3550 | AT – sequence | 33%(285/855) | Sep 8, 2025 |
| 3524 | Bug Hunt | 46%(401/859) | Sep 22, 2025 |
| 3514 | The Writers' Club | 20%(187/898) | May 22, 2025 |
| 3586 | The missionaries and cannibals | 9%(90/928) | Sep 5, 2025 |
| 3535 | A+B | 40%(404/988) | Sep 1, 2025 |
| 3583 | Text Message Formatting | 13%(140/1019) | Sep 1, 2025 |
| 3598 | PopKart | 22%(244/1085) | May 13, 2025 |
| 3538 | Domestic Networks | 25%(291/1150) | Sep 1, 2025 |
| 3542 | History of Football | 23%(279/1193) | Sep 4, 2025 |
| 3577 | Global Positioning System | 8%(106/1296) | Sep 4, 2025 |
| 3567 | Cactus Reloaded | 32%(423/1314) | May 2, 2025 |
| 3519 | Minimal Backgammon | 57%(770/1348) | Sep 8, 2025 |
| 3503 | Summits | 35%(482/1361) | Sep 6, 2025 |
| 3554 | Almost the shortest route | 25%(352/1375) | May 13, 2025 |
| 3546 | Sea battle | 34%(480/1383) | Sep 1, 2025 |
| 3597 | Polygon Division | 53%(762/1435) | Sep 6, 2025 |
| 3588 | The Downloading Task | 25%(369/1435) | Sep 4, 2025 |
| 3573 | I18n | 24%(365/1495) | May 4, 2025 |
| 3532 | Resistance | 33%(517/1551) | Dec 27, 2024 |
| 3593 | Sea Base Exploration | 27%(454/1637) | Sep 1, 2025 |
| 3557 | Map Generator | 26%(473/1765) | Jan 25, 2025 |
| 3539 | Elevator | 27%(516/1855) | Nov 23, 2024 |
| 3541 | Given a string… | 21%(419/1950) | Sep 4, 2025 |
| 3505 | Tower Parking | 61%(1229/2010) | Sep 2, 2025 |
| 3576 | Language Recognition | 26%(540/2015) | Aug 28, 2025 |
| 3566 | Building for UN | 44%(910/2053) | Aug 1, 2025 |
| 3530 | A Modular Arithmetic Challenge | 16%(338/2092) | Sep 6, 2025 |
| 3509 | Rotating Rings | 38%(811/2111) | May 25, 2025 |
| 3561 | Pseudographical recognizer | 40%(994/2446) | Nov 30, 2024 |
| 3534 | Escape of Life and Death | 12%(327/2604) | Dec 24, 2024 |
| 3590 | The shuffle Problem | 33%(872/2631) | Sep 1, 2025 |
| 3543 | iChess | 44%(1183/2667) | Aug 17, 2024 |
| 3528 | Ultimate Weapon | 47%(1274/2681) | Sep 1, 2025 |
| 3513 | Let's Go to the Movies | 20%(596/2848) | May 20, 2025 |
| 3594 | Escort of Dr. Who How | 27%(789/2907) | Aug 1, 2024 |
| 3504 | Obfuscation | 19%(603/3135) | Sep 2, 2025 |
| 3501 | Escape from Enemy Territory | 26%(847/3202) | May 25, 2025 |
| 3510 | A Tale from the Dark Side of the Moon | 27%(943/3398) | Sep 2, 2025 |
| 3587 | The Biggest Cake | 17%(625/3497) | Sep 19, 2024 |
| 3544 | Journey with Pigs | 31%(1105/3504) | Sep 1, 2025 |
| 3523 | The Morning after Halloween | 22%(807/3515) | Sep 19, 2025 |
| 3516 | Johnny Hates Math | 11%(443/3700) | Sep 5, 2025 |
| 3512 | Incidental Points | 22%(1193/5321) | Sep 8, 2025 |
| 3537 | Crosses and Crosses | 37%(2182/5788) | Sep 18, 2025 |
| 3536 | Beer Refrigerator | 39%(2324/5902) | May 31, 2025 |
| 3517 | And Then There Was One | 55%(3535/6382) | Sep 22, 2025 |
| 3508 | Hide That Number | 27%(2000/7164) | May 22, 2025 |
| 3589 | Number-guessing Game | 71%(5436/7636) | Sep 6, 2025 |
| 3525 | Most Distant Point from the Sea | 43%(3313/7704) | Sep 26, 2025 |
| 3592 | Instantaneous Transference | 22%(1816/8086) | Apr 28, 2025 |
| 3511 | Fermat's Christmas Theorem | 21%(1902/8968) | Sep 2, 2025 |
| 3507 | Judging Olympia | 47%(4319/9169) | Sep 2, 2025 |
| 3565 | Ants | 32%(3144/9706) | Sep 2, 2025 |
| 3581 | Sequence | 22%(2404/10564) | Jun 28, 2025 |
| 3522 | Slim Span | 52%(6160/11707) | Sep 15, 2025 |
| 3518 | Prime Gap | 56%(7045/12552) | Sep 16, 2025 |
| 3585 | Accumulation Degree | 21%(2838/13393) | Oct 9, 2025 |
| 3580 | SuperMemo | 29%(7335/24607) | Oct 9, 2025 |
| 3579 | Median | 32%(8845/26843) | Sep 22, 2025 |
